This is very strange to me. I was taking a nap and woke up to my 5 year old son hold his lips to my lips. He didn't stick his tongue in my mouth but as I was waking I felt him puckering his lips to mine for about 5 seconds. I pretended to stay asleep to see what else he would do. I pretended to wake up quickly and he jumped away starteled. I said what are you doing sweetie. He said nothing and laid back down on the other end of the couch. Because I was so curious, I pretended to fall asleep. He waited till he felt like I was asleep again only about 20 seconds later. He walked over to me, picked up my hand and held it and then tried to kiss me again. This time I woke up and said, "hey sweetie, what it is, are you trying to give mommy a kiss?" He seemed embarrased and laid back down. I didn't know how to react. I left it alone but I know something needs to be done. I didn't tell him I knew what he was doing because I didn't want him to think that I approved of that sort of behavior. What should I do?